By Krystal Hu and Yuvraj Malik

(Reuters) -Microsoft's LinkedIn said on Monday it would lay off 668 employees across its engineering, talent and finance teams in the second round of job cuts this year for the social media network for professionals amid slowing revenue growth.

The cuts, which affect more than 3% of the 20,000-strong staff, add to the tens of thousands of job losses this year in the technology sector in the face of an uncertain economic outlook.

The sector has laid off 141,516 employees in the first half of the year compared with about 6,000 a year ago, according to employment firm Challenger, Gray & Christmas.

LinkedIn makes money through ad sales and by charging for subscriptions to recruiting and sales professionals who use the network to find suitable job candidates.

In the fourth quarter of its fiscal 2023 year, LinkedIn's revenue increased 5% year-on-year, compared to 10% in the previous quarter.

Microsoft has cited a slowdown in hiring along with a decline in advertising spending as headwinds for LinkedIn, although it continues to add new members to its community of 950 million.

LinkedIn in May decided to cut 716 jobs across sales, operations and support teams to streamline its operations and remove layers to help make quicker decisions.

(Reporting by Krystal Hu in New York; Additional reporting by Yuvraj Malik and Aditya Soni in Bengaluru; Editing by Arun Koyyur and Emelia Sithole-Matarise)